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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build amd64
// test_util_amd64.s provides AMD64 test functions.
#include "funcdata.h"
#include "textflag.h"
TEXT ·Getpid(SB),NOSPLIT,$0
NO_LOCAL_POINTERS
MOVQ $39, AX // getpid
SYSCALL
RET
TEXT ·Touch(SB),NOSPLIT,$0
start:
MOVQ 0(AX), BX // deref AX
MOVQ $39, AX // getpid
SYSCALL
JMP start
TEXT ·HaltLoop(SB),NOSPLIT,$0
start:
HLT
JMP start
TEXT ·SyscallLoop(SB),NOSPLIT,$0
start:
SYSCALL
JMP start
TEXT ·SpinLoop(SB),NOSPLIT,$0
start:
JMP start
TEXT ·FloatingPointWorks(SB),NOSPLIT,$0-8
NO_LOCAL_POINTERS
MOVQ $1, AX
MOVQ AX, X0
MOVQ $39, AX // getpid
SYSCALL
MOVQ X0, AX
CMPQ AX, $1
SETEQ ret+0(FP)
RET
#define TWIDDLE_REGS() \
NOTQ R15; \
NOTQ R14; \
NOTQ R13; \
NOTQ R12; \
NOTQ BP; \
NOTQ BX; \
NOTQ R11; \
NOTQ R10; \
NOTQ R9; \
NOTQ R8; \
NOTQ AX; \
NOTQ CX; \
NOTQ DX; \
NOTQ SI; \
NOTQ DI; \
NOTQ SP;
TEXT ·TwiddleRegsSyscall(SB),NOSPLIT,$0
TWIDDLE_REGS()
SYSCALL
RET // never reached
TEXT ·TwiddleRegsFault(SB),NOSPLIT,$0
TWIDDLE_REGS()
JMP AX // must fault
RET // never reached
#define READ_FS() BYTE $0x64; BYTE $0x48; BYTE $0x8b; BYTE $0x00;
#define READ_GS() BYTE $0x65; BYTE $0x48; BYTE $0x8b; BYTE $0x00;
TEXT ·TwiddleSegments(SB),NOSPLIT,$0
MOVQ $0x0, AX
READ_GS()
MOVQ AX, BX
MOVQ $0x0, AX
READ_FS()
SYSCALL
RET // never reached
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